There are several app notes for the DS278X family as follows:
AN 131 - Lithium-Ion Cell Fuel Gauging with Maxim Battery Monitor ICs
AN 2412 - characterizing a Li+ Cell for Use with a Fuel Gauge
AN 3406 - DS2780 Board Layout to Minimize Current Measurement Offset Error
AN 3463 - Getting Started with te DS2780
AN 3584 - Storing Battery Fuel Gauge Parameters in DS2780
AN 3727 - Storing Battery Fuel Gauge Parameters in DS2781
AN 3978 - Getting Started with the DS2786K
AN 3992 - Interpreting the Open Circuit Voltage (OCV) Fuel Gauge of the DS2786
AN 4106 - Using the DS2786 BATTERY Fuel Gauge in a 2 Cell Battery Pack
AN 4114 - Calibrating RSGAIN for the DS278x Family of Fuel Gauges
AN 4141 - Programming and Testing a DS2786 Based Circuit
AN 4188 - Calibrating the Current Offset Bias (COB) Register for the DS278x Family of Fuel Gauges
AN 4189 - Characterizing a Lithium Ion Batery Cell for use with am Open Circuit Voltage (OCV) Based Fuel Gauge (Applies to DS2786 in the DS278X family)
AN 4192 - Adding Thermal Protection to the DS2784 Stand Alone Fuel Gauge
AN 4219 - Protection Circuitry for Reversed Charger Connections to the DS2784 High Side nFET Protector
AN 4224 - Using the DS2786 Battery Fuel Gauge in the Host Side of a 2-Cell Battery Application